Fortunately I have the full line of plasma weapons (I can never remember which one has each name, save for the Tormentor) at G5 and fully modded, so I can always use them; also finally have a reason to use all the non-Tormentor ones.Yes, unfortunately, if not worse due to bullet travel. My G5 AR-50 didn't do appreciable damage within an extended magazine in a test I just ran.
At least the Tormentor still works, so I guess stick with the Tormentor, Executioner, Intimidator, and the solution to all Odyssey-related combat problems: the L-6.
The problem with the L6 is it is easy to miss a flying target with it. I won't be trying that again anytime soon.